| 摘要: |
| 针对现有深松机在红壤耕地犁底层土壤深松阻力大、幅宽小、效率低等问题，设计一种基于气压劈裂的气压深松铲。采用CFD软件建立南方耕地红壤犁底层土壤的模型进行深松气压范围标定，并针对相同气压2 MPa下不同容重犁底层土壤的扩散特性进行研究。结果表明：红壤犁底层容重1.8 g/cm3土壤的有效起劈气压范围为1.6~2.4 MPa；容重1.6 g/cm3、1.8 g/cm3的犁底层土壤裂隙主要沿水平方向扩散，容重1.4 g/cm3的犁底层土壤裂隙则同时沿竖直方向与水平方向扩散；容重越大的犁底层土壤，深松效果越好。 |
| 关键词: 深松铲 气压深松 犁底层 气压劈裂 |
| DOI：10.11841/j.issn.1007-4333.2019.04.15 |
| 分类号: |
| 基金项目:福建省自然科学基金项目（2016J01001）；福建农林大学科技发展基金项目（KF2015026、KF2015027） |
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| Design of pneumatic deep shovel and gas pressure deep loose simulation analysis in red soil of the southern farmland |
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LIU Mingcai, SU Jilong
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College of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University, Fuzhou 350000, China
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| Abstract: |
| In view of the problems of deep substituting resistance,small width and low efficiency of the existing deep shovel in the red soil plough,a pneumatic deep shovel based on air pressure splitting was designed.CFD software was used to establish the model of the red soil plow bottom of the southern cultivated land to carry out the calibration of the deep gas pressure range,and the diffusion characteristics of the bottom layer of different volumetric plows under the same pressure of 2 MPa were studied.The results showed that the effective enthalpy pressure of the bottom layer of 1.8 g/cm3 red soil was 1.6-2.4 MPa;The crack of the bottom layer of the plough was mainly diffused horizontally,while the crack of the bottom of the plough with smaller bulk density is also vertical.In conclusion,by using the pneumatic deep shovel designed in this study,the direction and the horizontal direction were diffused,the bottom of the plow was larger,and the deeper pine effect was better. |
| Key words: deep shovel pneumatic deep loose plow bottom air pressure split |
